atomic force microscopy  - 2024 ACF Fall

Question

The motion of the tip when producing images with this technique determines whether it is described as contact or tapping mode. For 10 points each:

[10h] Name this technique used to produce extremely high resolution images. The deflection of a laser beam is used to measure how much the tip of a cantilever moves in this technique.

ANSWER: atomic force microscopy [or AFM; accept scanning force microscopy or SFM; prompt on microscopy; prompt on scanning probe microscopy; reject “electron microscopy”]

[10m] The scanners in atomic force microscopes have this property. Occurring only in crystals with no inversion symmetry, materials with this property produce a potential difference when subject to mechanical stress.

ANSWER: piezoelectric [accept piezoelectricity; accept piezoelectric effect]

[10e] Cantilevers made of this mineral can be used in piezoelectric detection. This mineral is used in watches and is composed of silicon dioxide.

ANSWER: quartz

Back to bonuses

Summary


2024 ACF Fall at Cornell	fall	Y	8	15.00	100%	38%	13%
2024 ACF Fall at Ohio State	fall	Y	8	13.75	100%	38%	0%
2024 ACF Fall at Washington	fall	Y	6	18.33	100%	67%	17%
2024 ACF Fall at Georgia	fall	Y	10	13.00	100%	30%	0%
2024 ACF Fall at North Carolina	fall	Y	9	14.44	89%	33%	22%
2024 ACF Fall at Claremont Colleges	fall	Y	5	22.00	100%	80%	40%
2024 ACF Fall at Rutgers	fall	Y	7	17.14	100%	43%	29%
2024 ACF Fall at Illinois	fall	Y	9	20.00	100%	67%	33%

Data


Michigan State B	CWRU A (UG)	0	0	10	10
UNC C	James Madison A	10	10	10	30
Liberty A	Liberty C	0	0	10	10
WashU B	Chicago B	0	10	10	20
Indiana	Illinois A	0	10	10	20
Illinois C	Notre Dame B	0	0	10	10
Iowa A	Purdue C	0	10	10	20
Northwestern A	Illinois B	0	10	10	20
Cornell A	Binghamton A	0	0	10	10
Binghamton B	RIT A	0	0	10	10
Cornell G	RIT C	0	0	10	10
Penn State	Binghamton C	0	0	10	10
Miami B (UG)	Miami C (DII)	0	10	10	20
Alberta	UBC A	0	10	10	20
UW Lust	UBC B	0	10	10	20
UW Gluttony	UW Wrath	0	0	10	10
UW Pride	UW Sloth	0	0	10	10
Tennessee A	Auburn B	0	0	10	10
Furman	Auburn C	0	0	10	10
Belmont	Tennessee B	0	0	10	10
Clemson A	Georgia A	0	10	10	20
Clemson B	Georgia Tech C	0	0	10	10
Georgia Tech E	Georgia Tech A	0	0	10	10
Alabama A	Southern	0	0	10	10
South Carolina B	Vanderbilt A	0	10	10	20
Emory A	South Carolina A	0	0	10	10
UNC B	Appalachian State B	0	0	10	10
VCU	Duke A	0	10	10	20
NC State	Duke B	0	0	10	10
James Madison B	UNC A	0	0	0	0
UNC D	Appalachian State A	0	0	10	10
Virginia Tech B	Liberty B	0	10	10	20
Virginia Tech A	Virginia	10	0	10	20
Maryland B	Columbia A	0	0	10	10
Columbia B	Penn A (DII)	0	0	10	10
Columbia J (DII)	Rowan A (DII)	10	10	10	30
Fordham A	Penn B (DII)	0	0	10	10
Rutgers B	Maryland A (DII)	10	10	10	30
Lehigh A (UG)	NYU B	0	0	10	10
Princeton A (UG)	Bard A (UG)	0	10	10	20
Northwestern B	Chicago A	10	10	10	30
Purdue B	Notre Dame C	10	10	10	30
Cornell D	ESF	10	10	10	30
RIT B	Cornell F	0	10	10	20
Cornell E	Syracuse	0	0	10	10
Cornell C	U of Rochester B	0	10	10	20
CWRU C (UG)	Michigan B (UG)	0	0	10	10
Michigan D (UG)	Miami A (UG)	0	0	10	10
CWRU B (DII)	Michigan A (UG)	0	10	10	20
Michigan C	Michigan State A	0	10	10	20
Ohio State A (UG)	Ohio State C (DII)	0	0	10	10
Ohio State B (DII)	West Virginia A (UG)	0	0	10	10
UW Chastity	UW Greed	0	10	10	20
Boise State	UW Envy	10	10	10	30
Emory Oxford	Auburn A	0	10	10	20
Claremont A	Claremont C	0	10	10	20
UCLA B	Claremont B	0	0	10	10
UCSD	UCLA A	10	10	10	30
UCLA E	UCLA C	10	10	10	30
UCLA D	USC	0	10	10	20
Illinois D	SIUE	0	0	10	10
Purdue A	WashU A	10	0	10	20